:root {
  --bg: #f1f5f9;
  --card: #ffffff;
  --primary: #1e3a8a;
  --primary-soft: #3b82f6;
  --text: #0f172a;
  --muted: #64748b;
  --danger: #b91c1c;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.app-header {
  background: linear-gradient(120deg, var(--primary), #0f766e);
  color: #fff;
  padding: 1.2rem;
}

.app-header h1 { margin: 0; font-size: 1.6rem; }
.app-header p { margin: 0.35rem 0 0; font-size: 0.95rem; opacity: 0.95; }

.container {
  max-width: 760px;
  margin: 0 auto;
  padding: 1rem;
  display: grid;
  gap: 1rem;
}

.card {
  background: var(--card);
  border-radius: 12px;
  padding: 1rem;
  box-shadow: 0 2px 16px rgba(2, 6, 23, 0.08);
}

.hidden { display: none !important; }

h2 { margin-top: 0; font-size: 1.2rem; }
label {
  display: block;
  margin: 0.7rem 0;
  font-size: 0.94rem;
}

input, select, button {
  width: 100%;
  margin-top: 0.35rem;
  padding: 0.7rem;
  border-radius: 10px;
  border: 1px solid #cbd5e1;
  font-size: 1rem;
}

button {
  border: none;
  background: var(--primary);
  color: white;
  font-weight: 600;
  cursor: pointer;
}

button.secondary {
  background: #334155;
}

.tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  margin-bottom: 0.8rem;
}

.tab {
  background: #e2e8f0;
  color: #0f172a;
}

.tab.active {
  background: var(--primary-soft);
  color: #fff;
}

.camera-grid {
  border: 1px dashed #94a3b8;
  border-radius: 10px;
  overflow: hidden;
  min-height: 220px;
  background: #111827;
}

#cameraPreview, #previewImage {
  width: 100%;
  display: block;
}

.scan-actions {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 0.5rem;
  margin-top: 0.8rem;
}

.file-input-label {
  display: block;
  text-align: center;
  background: #0f766e;
  color: #fff;
  border-radius: 10px;
  padding: 0.7rem;
  margin: 0;
}

.file-input-label input { display: none; }

.progress-wrapper {
  height: 10px;
  border-radius: 999px;
  background: #e2e8f0;
  overflow: hidden;
}

#progressBar {
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, #22c55e, #16a34a);
  transition: width 0.35s ease;
}

.message {
  color: var(--danger);
  min-height: 1.2rem;
}

a { color: var(--primary); }

@media (max-width: 640px) {
  .scan-actions {
    grid-template-columns: 1fr;
  }
}